The old saying is "If it ain't broke, don't fix it". The first Hardbodies film worked well. It did everything it set out to do. A sunny beach, pretty girls and light-hearted humour. If they'd done the same again in the sequel, sure, the critics would have slammed it. But who cares what the critics say? The public would have loved it.
In itself that sounds like a good plot. It could have worked if it had been made better. But it didn't. The story bored me, and I sat wishing that they'd stuck to the same simple formula as the first film. At the moment the two films are only available together as a Hardbodies collection. If you buy the first film, which I recommend, you'll get the second film for free. That's good, because it isn't worth spending money on.